Oil Return/Sight Glass Maintenance - Sullair LS20TS Operator's Manual And Parts List

Figure 7-4 Oil Return/Sight Glass
*Replacement Filter Assembly P/N 02250117-782
top of the separator element.
4. Remove the old separator element and discard.
5. Scrape the old gasket material from the tank lid
mounting surface and the flanges mounting sur-
face on the tank. Be sure to keep all scrapings
from falling back inside of the tank.
6. Before installing the new separator elements,
make sure to lubricate both sealing gaskets on
the element with a lubricating compound (i.e.
Silglyde). Now install the new separator ele-
ments and retaining ring. Torque the capscrews
to 150 ft.-lbs. (203 Nm). DO NOT over-tighten,
as damage to the separator element can result.
7. Next, install the tank flange gasket that is provid-
ed. Before installing, lubricate both sides of the
gasket (i.e. Silglyde). Reinstall the tank lid.
Install the capscrews finger tight, then gradually
tighten in a crisscross pattern in 4 to 5 steps.
Always tighten the capscrews alternately at
opposite sides of the cover. Lube torque cap-
screws to 225 ft.-lbs. (305 Nm).
8. Clean or replace fluid return line strainer.
KEY
MALE TUBE
A
CONNECTOR
FILTER
B
ASSEMBLY*
SIGHT GLASS/
C
ORIFICE BLOCK
BRASS PLUG
D
ORIFICE
E 90º ELBOW
FEMALE TUBE
F
CONNECTOR
MOUNTED TO
G
SUMP TANK
Figure 7-5 Pressure Regulator Adjustments
H BRASS TEE
9. Clean the fluid return line orifice installed in the
side of the compressor unit air end.
10. After assembly is complete, check for continuity
between the separator flange and the lid and
tank flange with an ohmmeter.

OIL RETURN/SIGHT GLASS MAINTENANCE

Refer to Figure 7-4. The oil return/sight glass sub-
assembly is attached to the separator tank lid. Oil
return/sight glass maintenance should be per-
formed on a routine basis parallel to that of the fluid
filter, or as indicated in the Troubleshooting Section
of this manual.
For additional information, consult the Trouble-
shooting Section in the Supervisor Controller
manual.
The maintenance on an oil return/sight glass is
mainly concerned with the condition of the filter
assembly.
Section 7
MAINTENANCE
33